Fully automatic installations make sense when you need to install a vast number of machines. For Debian (but not limited to it) there is the FAI project
that helps you with those kind of undertakings.
When FAI uses Debian packages (i.e. .deb
files) for installation the automatic installation process gets into trouble when such a package asks for manual configuration interactively. Really, this is not specific to FAI: The Debian installer (the installation wizard guiding you through...